/Engine/Source/Runtime/Engine/Public/HLSLTree/HLSLTreeCommon.h
FExpressionDerivative ( [EDerivativeCoordinate](API\Runtime\Engine\HLSLTree\UE__HLSLTree__EDerivativeCoordin-) InCoord, const [FExpression](API\Runtime\Engine\HLSLTree\FExpression) * InInput )